examples are stored in subdirectories
Using quarto 1.4.550 on Ubuntu linux, render the example
quarto render presentation/presentation.qmd
this should open a browser tab
head --bytes=80 presentation/presentation_files/libs/revealjs/dist/theme/quarto.css
shows that the combined css is wrong, it should not be using the Montserrat font. When rendering with quarto 1.4.550 on macOS, the combined css is correct.
This problem only shows up in the reprex after adding the theme setting.